psychological flexibility only predicted mental health when DIDF was involved. Psychological flexibility allowed participants to have a better understanding of the subtleties of pleasant and unpleasant emotions. This understanding allowed participants to identify and describe their feelings better, thus enhancing their mental health. A 2-year longitudinal study found that psychological flexibility helps with long-term emotional adjustment. People who are better at enhancing and suppressing their expression of emotions are less likely to be stressed over time. People with higher psychological flexibility are also able to have greater endurance, higher pain tolerance, and a quicker recovery rate to baseline levels when experiencing physical pain. How to improve Improvements can be made to psychological flexibility through training, such as through various forms of psychotherapy. Acceptance and commitment therapy The main goal of acceptance and commitment therapy (ACT) is to increase psychological flexibility. ACT is a form of therapy that aims to help people accept unavoidable events, identify actions that will lead to goals, and acknowledge thoughts rather than accepting or disregarding them. When psychological flexibility was targeted in one study of ACT, there was a stronger reduction in psychological distress. There are six core processes in ACT interventions: acceptance, cognitive defusion, self as context, being present, values, and committed action. Acceptance is taught in order to teach people to embrace their emotions, rather than trying to get rid of them. An example of acceptance would be when people feel angry and then choose to focus on the anger and accept that they are angry, rather than trying to unleash their anger to get rid of it. Cognitive defusion teaches people to not take their thoughts as literal in order to decrease the believability of negative thoughts and increase flexibility to behave as they want. An example of cognitive defusion would be when someone thinks "I am the worst," and then notices the thought for what it is—mere words—perhaps by saying to themselves "I am having the thought that I am the worst". This is in contrast to a cognitive therapy approach where the person might challenge the thought by thinking of things in which he or she excels. Self-as-context attempts to have people create an awareness of their own experiences without being attached to them. This process is done in order to help people let go of specific content and experience themselves. Being present teaches people to directly experience the world by